Android ViewGroup crash: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference

Question

We have found several cases for this kind of crashes reported by backend logging monitoring. It seems the crashes do not tie to particular UX failure. And from the reports,

Answer 1

The problem is in the ViewGroup's dispatchDraw() method. This method tries to draw all the ViewGroup's children. When a child is null, you get an exception, which most likely comes from this line: if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { (notice the mViewFlags).

So the problem is that one of your views, somewhere, is not properly initialized. I'm afraid that's the best I can do.